Blue Turquoise Rough Rock Stone
These 2 Turquoise rough rock pieces weigh 5.5 oz. or about 150 grams.
The larger piece is 2.8 inches by 1.5 inches to 2 inches wide and .4 to .6 inch thick, and the smaller piece is 1.5 inches by 1.5 inches and .8 inches thick.
Two lovely light blue semi precious stones of naturally hard and cuttable Turquoise from Kingman, Arizona. One edge of the larger piece has been polished.
Probably one of the most recognized semiprecious gemstones in existence, turquoise has been popular since prehistoric times.
This stone is a hydrated aluminum copper phosphate that often contains iron. Its name comes from French pierre turquoise, meaning "Turkish stone," a reference to where Persian material passed on its way to Europe.
It occurs naturally in shades ranging from sky blue to grey-green, usually in locations where copper is hidden in the soil in high concentrations.
The blue color is caused by copper, while the green color is caused by iron or chromium.
The name means Turkish stone, because the trade route that brought it to Europe used to come via Turkey.